Unexpected Strong Blue Photoluminescence Produced from the Aggregation of Unconventional Chromophores in Novel Siloxane-Poly(amidoamine) Dendrimers

被引：202
作者：
Lu, Hang
Feng, Linglong
Li, Shusheng
Zhang, Jie
Lu, Haifeng [1 ]
Feng, Shengyu
机构：
[1] Shandong Univ, Key Lab Special Funct Aggregated Mat, Jinan 250100, Peoples R China
来源：
MACROMOLECULES | 2015年 / 48卷 / 03期
基金：
中国国家自然科学基金;
关键词：
FLUORESCENCE EMISSION; POLY(AMIDO AMINE); PAMAM DENDRIMERS; POLYMERS;
D O I：
10.1021/ma502352x
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Poly(amidoamine) (PAMAM) dendrimers and hyperbranched poly(amidoamine)s are the first reported and most investigated luminescent polymers containing unconventional chromophores. The luminescence of these compounds is associated with the N-branched tertiary amine moiety, and the oxidation of the tertiary amine is assigned to the emitting source. However, in this paper, a series of novel siloxanepoly(amidoamine) (Si-PAMAM) dendrimers were synthesized by aza-Micheal reaction, and strong blue photoluminescence was observed even with the naked eye when these compounds were excited by a UV lamp. All of these compounds were not oxidated at all. Studies on the molecular structure showed that N -> Si coordination bonds existed in these compounds, and those N -> Si bonds caused the aggregation of carbonyl groups which show the strong luminescence.
引用
收藏
页码：476 / 482
页数：7
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